Category: Evolution

Antiboitic Resistance Doesn’t Dissapear Quickly

A piglet nursing (Image in the public domain.)

Those who are not very familiar with the phenomenon of antibiotic resistance often use it as evidence to support evolution. However, those who understand genetics and biochemistry do not. That’s because most antibiotic resistance arises from genes that have been around for a long, long time. For example, an interesting study published just this year showed that many of the genes involved in antibiotic resistance were around with the mammoths, long before antibiotics were available. This seems to indicate that rather than being a response to the human production of antibiotics, at least some antibiotic-resistance genes are necessary for the proper survival of bacterial populations.

A new study provides additional evidence for this idea. In the study, researchers analyzed pigs that were kept on a pig farm known to be antibiotic free for two and a half years. The results were not at all what they expected. You see, bacteria have two ways of storing DNA. They have their primary genome, which contains all sorts of genetic information. However, they also have small, circular strands of DNA called plasmids. An important difference between a bacterium’s primary DNA and its plasmids is that a bacterium can transfer plasmids to other bacteria. It cannot do so with its primary genome.

Because of this distinction, plasmids are generally thought to be “accessory” DNA. They contain lots of nice information, but since they are not a part of the bacterium’s primary genome, they are considered non-essential components. Since copying a plasmid each time the bacterium reproduces takes energy, it is assumed that bacteria get rid of plasmids that they aren’t using.

Well, it turns out that most known genes that confer antibiotic resistance to bacteria are found on plasmids. Since biologists assume that plasmids which aren’t used are lost after a few generations, it was assumed that if you get rid of antibiotics, a bacterial population would get rid of the plasmids that contained genes for antibiotic resistance in just a few generations. It turns out that they were wrong.

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Certainty and Science Do Not Go Together!

Dr. Daniel Botkin holds a PhD in ecology and is currently Professor Emeritus in the Department of Ecology, Evolution, and Marine Biology at the University of California, Santa Barbara. He is best known for his books about nature, and has been called “one of the preeminent ecologists of the 20th century.” His website has a lot of good material, including an excellent FAQ regarding global warming.

The reason I am blogging about Dr. Botkin is that he authored a fantastic article in the December 2, 2011 issue of the Wall Street Journal. The article starts with an incredibly unscientific quote which comes (ironically enough) from NASA senior scientist Michael J. Mumma:

Based on evidence, what we do have is, unequivocally, the conditions for the emergence of life were present on Mars—period, end of story.

This kind of statement might excite people, but it does nothing to promote science. In fact, it does quite the opposite. As Dr. Botkin masterfully points out in his article, the phrase “period, end of story” should never be uttered by anyone who is trying to be scientific. The fact is that in science, we never have the end of the story. New information comes in constantly, and sometimes, it overturns old ideas, despite the fact that those ideas might be accepted by virtually every scientist on the planet. As the title of Dr. Botkin’s article correctly proclaims, absolute certainty is not scientific.

Dr. Botkin goes on to discuss how global warming advocates hurt their cause by making statements with absolute certainty, and I agree with his assessment. As I read his article, however, I couldn’t help but think about the hypothesis of evolution.

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The Debate Rages On…At Many Levels

I spend a lot of time discussing the creation/evolution debate. It is a popular topic on this blog, I have an entire series of young-earth creationist textbooks that discuss the debate, and I even discuss it among my own friends, many of whom are either atheists or theistic evolutionists. Every now and again, I even get the chance to publicly debate an evolutionist. This is a rare occurrence, however, as it is incredibly difficult to find an evolutionist willing to actually defend his or her view in a public debate. My last opportunity was in 2009, when I debated Dr. Robert A. Martin, vertebrate paleontologist and author of Missing Links: Evolutionary Concepts and Transitions Through Time. The debate was held at West Kentucky Community and Technical college. The audience was huge, and their response was enthusiastic. After the debate, I talked with many students, some of whom disagreed with me. Nevertheless, they all said that they appreciated the debate and were very happy that they attended.

Of course, the bigger question is whether or not such debates make any difference at all. Do any minds actually get changed as a result of a debate? I can tell you that mine did. I was an atheist at one time, and what led me down the road to accepting the truth of Christianity was an “Atheism versus Christianity” debate that I attended. The debate made me actually investigate the evidence for the existence of God, and when I did so, I found the evidence to be overwhelming. As a result, I ended up believing in God and, eventually, I came to realize that He is the God of the Old and New Testaments. However, I often wonder if a debate has changed anyone’s mind on the creation/evolution issue.

Well, I received an E-MAIL from a homeschool graduate who is now a biology major pursuing an MD/PhD. He says:

I was home educated from preschool all the way through high school and thoroughly enjoyed all of your science textbooks throughout high school…In fact your biology textbook was what got me interested in science in the first place.

It’s nice to know that contrary to what Dr. Jerry Coyne claims, good young-earth creationist textbooks do encourage students to study the sciences.

The reason I am blogging about his E-MAIL, however, is that he tells me from his own experience that a good debate about evolution can change people’s minds.

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Life Isn’t All That Special?

Dr. Seth Shostak has a B.S. in physics from Princeton and a PhD in astronomy from the California Institute of Technology. Obviously, then, he knows a thing or two about astronomy. His original research started out using radio telescopes to measure the motion of distant galaxies, but for quite some time now, he has been involved in the search for extraterrestrial intelligence (SETI). He is currently the senior astronomer at the SETI institute.

In a recent report, CNN interviewed him to lead off a discussion about the possibility of extraterrestrial life. Here’s what he said:

…one thing that strikes you is that every time we learn something new about the universe, what we learn is that our situation doesn’t seem to be all that special, and that suggests that life is not all that special, either.

When I heard that statement, the first thing I wondered was, “How can such a well-educated astronomer say something that absurd?” Really? Our situation isn’t all that special? We live on a special planet that orbits a special star (at just the right distance) that resides in a special part of the galaxy. Yet our situation isn’t all that special?

And then there’s the last part of the statement. Life isn’t all that special? Really? Even with all our technology, we can’t come close to making it. Indeed, single-celled organisms can stitch DNA together better than we can. Despite a lot of looking, we haven’t found life anywhere else in the universe. Nevertheless, according to Dr. Shostak, it isn’t all that special.

I was hoping that the rest of the video would explain how in the world anyone could consider such a statement to be even remotely reasonable. However, it never did.

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Yet Another Failure of “Geological Column” Reasoning

Skeleton of the titanosaur Epachthosaurus at the National Museum, Prague, Czech Republic. Note the plant, a cycad, in the display. (Click for credit)

If a display of dinosaurs or dinosaur skeletons includes plants, it usually shows the dinosaurs walking among ferns or cycads, like the picture shown above. There usually aren’t any grasses in the display. Why not? Because according to the geological column, grasses and dinosaurs didn’t live at the same time. After all, dinosaurs mostly died out by the end of the Cretaceous period, which was supposed to have closed about 65 million years ago. According to You Are Here: A Portable History of the Universe, grasses didn’t evolve until much later:1

Rabbits and hares appear 55 million years ago. The Himalayas begin to rise 50 million years ago. The face of the earth looks recognisably as it is now, except that Australasia is attached to Antarctica. Bats, mice, squirrels, and many aquatic birds (including herons and storks) appear during this period, as do shrews, whales, and modern fish. All major plants make their appearance and grasses evolve.

Notice how certain the author is. He is telling you the story of the history of life as if he is watching it happen. According to his “observations,” grasses didn’t evolve until about 50 million years ago, long after the dinosaurs went extinct.

This kind of certainty is rampant in evolutionary writings. For example, The Encyclopedia of Earth tells us:

The evolution and spread of grasses UNDOUBTEDLY resulted from their ability to adapt to seasonally dry habitats created as tropical-deciduous forests developed in the Eocene (58 to 34 mya, million years ago). Considering their importance and taxonomic diversity, grasses have a relatively poor fossil record. While the earliest potential fossil grass pollen was described from late Cretaceous sediments, the oldest reliable megafossil grass fossils were spikelets and inflorescences from the latest Paleocene (about 58 mya). These were PRIMITIVE proto-bamboos with broad leaves, QUITE UNLIKE the narrow-leaf modern grasses of desert grasslands and deserts. (emphasis mine)

Of course, as is often the case, current research is demonstrating just how wrong this evolution-inspired reasoning is.

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When You’re Desperate, Anything Is Plausible

A commenter left this link on an unrelated post. Since the commenter has, in the past, tried to support several unscientific positions, I assume he or she thought that the experiment demonstrated the plausibility of abiogenesis, the the idea that life might have emerged through a series of incredibly unlikely interactions between nonliving chemicals. Of course, such an idea contradicts everything we know about the study of life, since all life we have ever studied comes from other living things. I have written several articles (here, here, here, here, here, and here) that demonstrate how the data speak against abiogenesis, but those who want to ignore the scientific evidence desperately hope for some special time in the past when all our current evidence doesn’t apply and life could actually spring from nonliving chemicals.

One of the many, many problems associated with any naturalistic origin-of-life scenario is that of stereoisomerism. As I explain here, there are certain biological molecules that can be formed in two different ways. They have the same chemical formula and form mirror images of each other. However, these mirror images are not identical. Think about your hands. When you hold them palms together, they are mirror images of one another. However, no matter how you tilt or turn it, you cannot make your left hand look identical to your right hand. If you put the palm of one hand on the back of the other hand, for example, one hand’s thumb will be where the other hand’s pinky finger is. So while your hands are mirror images, they are not identical. There are many biological molecules that are like that, and we call them chiral molecules. The two mirror images that are formed by a chiral molecule are called enantiomers.

All origin-of-life scenarios start with simple molecules that do not form enantiomers. We call these achiral molecules, since they cannot form two mirror images that are different from one another. This is a problem, because in the lab, when achiral molecules react to form a chiral molecule, an equal amount of each enantiomer is formed. As a result, you end up with a mixture that is 50% one enantiomer and 50% the other enantiomer. We call this a racemic mixture. The problem is that life isn’t like that. In most chiral molecules of life, only one of the enantiomers is used. We call this an enantiopure compound, since it is purely one enantiomer, without any of the other. So any origin-of-life scenario has to figure out a way of producing just one enantiomer, or it has to figure out a way to get rid of the other enantiomer once it has formed.

This is a major problem, of course, and the link that the commenter left claims that a “plausible” solution to this problem has been found. Of course, when you look at the actual paper you find that the process is anything but plausible in an origin-of-life scenario.

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Just Making Sure That Horse Is Really Dead…

I have written two posts about people who have mischaracterized the views of C.S. Lewis when it comes to evolution (you can read them here and here). At the risk of beating a dead horse, I want to write one more.

In both of my previous posts, I mention an article by Dr. Jerry Bergman. In that article, Dr. Bergman tries to make the case that C.S. Lewis is a “creationist and anti-evolutionist.” I think that my posts have done a good job of showing that Dr. Bergman is simply wrong. Dr. Lewis cannot be described as either a creationist or an anti-evolutionist. I have shared my posts with the author and with the people at Creation Ministries International, the organization that runs the website that published the article. Unfortunately, neither the author nor Creation Ministries International feels the need to retract it. Indeed, in a personal communication with Dr. Bergman, I was told that he had found C.S. Lewis scholars who agree with him. He did not provide the names of those scholars, however, even though I asked for them.

As a result, I decided to see if I could find any C.S. Lewis scholars who agree with Dr. Bergman on this issue. I went to the C.S. Lewis Foundation’s website. This is a wonderful organization that “…is dedicated to advancing the renewal of Christian thought and creative expression throughout the world of learning and the culture at large.” As a part of meeting that mission, the foundation has a study centre at “The Kilns,” Dr. Lewis’s former home in Oxford. I sent Dr. Bergman’s article to the foundation, asking them to have one of their scholars review it to see if it was a reasonable discussion of C.S. Lewis’s views on evolution.

A few days ago, I received a wonderful reply to my question. The author was humble, gracious, and very insightful. It started with these words:1

I am not entirely sure if I should be described as a “Scholar”, in fact I am pretty sure that I should not, but the folk at The Kilns have sent your question on to me.

He went on to give me his answer, some of which will appear below the fold. In that answer, he referred to Dr. Lewis as “Jack.” This is what his close friends and family called him, so as I read the message, I assumed that this man knew C.S. Lewis really well. As I reached the bottom of the message, I read his name: Douglas Gresham. If you don’t recognize the name, it is C.S. Lewis’s younger son. Lewis adopted both Douglas and his older brother, David, when he married their mother, Joy. When Joy lost her battle with cancer, Lewis continued to raise Douglas and David. He dedicated The Horse and His Boy, one of the books in his acclaimed Chronicles of Narnia series, to both of them. Douglas is a producer for all the Chronicles of Narnia movies, and he strives to make them follow the books as closely as they possibly can. He also appears as a minor character in each movie.

I think it is safe to say that Mr. Gresham is probably one of the few people alive today who knows what C.S. Lewis really believed when it comes to all manner of things, including evolution. Do you want to know what he said about Dr. Bergman’s article?

Continue reading “Just Making Sure That Horse Is Really Dead…”

Another Point About C.S. Lewis

About three months back, I posted an essay about how people mischaracterize the views of C.S. Lewis to make it look like he agreed with them on some issue. In that essay, I cited Dr. Michael L. Peterson, an evolutionist, who deliberately edited a quote by C.S. Lewis to make it sound like he was an ardent evolutionist. I then cited Dr. Jerry Bergman, a young-earth creationist, who ripped several of Lewis’s quotes waaayyyyy out of context to make it look like C.S. Lewis was an anti-evolutionist. As I said in my essay, neither of the authors is correct. In fact, C.S. Lewis was an evolutionist, but his faith in evolution was never very strong. He thought it might not be the last word on origins, and at minimum, it would require direct intervention by God at certain key points.

I have gotten some flack from a few of my fellow young-earth creationists for calling Dr. Bergman out on his mischaracterization of C.S. Lewis. However, I am very familiar with all of Lewis’s published works, and there is no doubt that Dr. Bergman was simply not being honest in his portrayal of Lewis. The problem is, most people are not very familiar with Lewis’s work. As a result, it is hard for the average reader to notice when people like Dr. Bergman and Dr. Peterson quote him in such a way as to mischaracterize his views.

Well…there is a popular expression: “Actions speak louder than words.” As I was searching for something in a book I read years ago, I stumbled across the fact that C.S. Lewis performed a specific action which definitively shows, contrary to Bergman’s claims, that C.S. Lewis was certainly not an anti-evolutionist.

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A Positive Step for the National Science Foundation

Since 1979, the National Science Foundation (NSF) has been producing a study entitled Science and Engineering Indicators. It is a quantitative review of science and engineering progress in the United States and the rest of the world. One chapter from that report is called “Science and Technology: Public Attitudes and Understanding,” and it attempts to assess how the people of the United States view and understand science compared to the people in the rest of the world. The way they try to gauge the public’s understanding of science is to produce a survey that asks questions such as, “How long does it take for the Earth to go around the Sun?” and “True or False: The center of the earth is very hot.”

For 20 years now, two of the True/False questions on that survey have been:

Human beings, as we know them today, developed from earlier species of animals.

The universe began with a huge explosion.

According to the journal Science, two expert panels formed by the NSF’s governing body, the National Science Board, have suggested changing these two true/false questions to:1

According to evolutionary theory, human beings, as we know them today, developed from earlier species of animals.

According to astronomers, the universe began with a huge explosion

The National Science Board has decided to ask the NSF to make that change on half of the surveys given out next time to see what effect it has on the results. This suggestion has infuriated some, but I see it as a very positive step for the NSF.

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Despite Their Protests, Evolutionist Do Depend on “Junk DNA,” and LOTS of It!

As important functions are found for more and more junk DNA, some evolutionists are trying to claim it is not all that important to evolution.
Once Susumu Ohno coined the term “junk DNA” and called it the remains of extinct genes1, junk DNA started to become the darling of the evolutionary community. First, it was seen as an effective argument against creationism or intelligent design. After all, why would the Creator put so much useless DNA into His creation? More importantly, however, it was considered an integral component of evolution. After all, evolution requires that genetic mutations acted on by natural selection produced genes with novel functions. However, it is difficult to expect that to work when the mutations occur in genes that the organism needs. Thus, one of the major mechanisms of genetic evolution involves gene duplication. In this view, a gene is duplicated, and one copy continues to produce the protein it always produced, while the other is free to mutate wildly. Waving the magic wand of time, the evolutionist then says that a large number of these mutating copies will become useless junk, but a small number of them will develop into novel genes. As you can see, then, junk DNA is integral to evolution, and according to evolution, most organisms should have a lot of it.

This, of course, is why Dr. Jerry Coyne says the following in his book, Why Evolution Is True:2,

When a trait is no longer used, or becomes reduced, the genes that make it don’t instantly disappear from the genome: evolution stops their action by inactivating them, not snipping them out of the DNA. From this we can make a prediction. We expect to find, in the genomes of many species, silenced, or ‘dead,’ genes: genes that once were useful but are no longer intact or expressed. In other words, there should be vestigial genes…Our genome—and that of other species—are truly well populated graveyards of dead genes.

Unfortunately for evolutionists, function is routinely being found for this supposed “junk DNA.” As a result, some evolutionists have realized that they need to back away from the claim that junk DNA is integral to the process of evolution.

Continue reading “Despite Their Protests, Evolutionist Do Depend on “Junk DNA,” and LOTS of It!”